Desa LDL3924NR Owner's Operation And Installation Manual

Also see for LDL3924NR: OWNER'S OPERATION AND INSTALLATION MANUAL OWNER'S OPERATION AND INSTALLATION MANUAL OWNER'S OPERATION AND INSTALLATION MANUAL

Contents

Desa LDL3924NR Owner's Operation And Installation Manual Manual pdf 7 page image

www.desatech.com111515-01J 7. . ____________ . Btu/Hr. (maximum. the.space.can.support).. . ____________ .Btu/Hr.(actual.amount.of.Btu/Hr.used). Example:.51,200 Btu/Hr (maximum the space can.support).73,000 Btu/Hr (actual amount of Btu/Hrused)The space in the above example is a confinedspace.because.the.actual.Btu/Hr.used.is.more.than.the.maximum.Btu/Hr.the.space.can.sup-port.. You. must. provide. additional. fresh. air..Your.options.are.as.follo.ws:A. Rework worksheet, adding the spaceof.an.adjoining.room..If.the.extra.space.provides an unconfined space, removedoor.to.adjoining.room.or.add.ventilation.grills.between.rooms..See.Ventilation AirFrom Inside Building.B.. Vent.room.directly.to.the.outdoors..See.Ventilation Air From Outdoors.C. Install a lower Btu/Hr heater, if lowerBtu/Hr size makes room unconfined.WARNING: If the area inwhich the heater may be oper-ated is smaller than that definedas an unconfined space or if thebuilding is of unusually tightconstruction, provide adequatecombustion and ventilation airby one of the methods describedin the National Fuel Gas Code,ANSI Z223.1/NFPA 54, Air forCombustion and Ventilation orapplicable local codes.VENTILATION AIRVentilation Air From Inside BuildingThis.fresh.air.would.come.from.an.adjoining.unconfined space. When ventilating to anadjoining unconfined space, you must providetwo.permanent.openings:.one.within.1".of.the.AIR FOR COMbUSTIONAND VENTILATIONContinuedceiling and one within 12" of the floor on thewall.connecting.the.two.spaces.(see.options.1 and 2, Figure 2). You can also remove doorinto adjoining room (see option 3, Figure 2).Follow. the. National Fuel Gas Code, ANSIZ223.1/NFPA 54, Air for Combustion andVentilation for required size of ventilationgrills.or.ducts.Ventilation Air From OutdoorsProvide. extra. fresh. air. by. using. ventilation.grills.or.ducts..You.must.provide.two.perma-nent.openings:.one.within.1".of.the.ceiling.and one within 12" of the floor. Connect theseitems.directly.to.the.outdoors.or.spaces.open.to.the.outdoors..These.spaces.include.attics.and.crawl.spaces..Follow.the.National FuelGas Code, ANSI Z223.1/NFPA 54, Air forCombustion and Ventilation for required sizeof.ventilation.grills.or.ducts..IMPORTANT: Do. not. provide. openings. for.inlet.or.outlet.air.into.attic.if.attic.has.a.thermo-stat-controlled.power.vent..Heated.air.entering.the.attic.will.activate.the.power.vent.Figure 2 - Ventilation Air from InsideBuildingOrRemoveDoor intoAdjoiningRoom,Option3Ventilation GrillsInto Adjoining Room,Option 2VentilationGrills IntoAdjoiningRoom,Option 112"12"Figure 3 - Ventilation Air from OutdoorsOutletAirVentilatedAtticOutletAirInletAirInlet Air VentilatedCrawl SpaceToCrawlSpaceTo Attic